fixed bug

tasks/main.yml

diff --git a/tasks/main.yml b/tasks/main.yml
index 25c8783..56d3f91 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -18,7 +18,7 @@
   - name: Cache bootstrap script state
     cache:
       key: bootstrap_script_exists
-      value: '{{ bootstrap_script.stat.exists }}'
+      value: '{{ bootstrap_exists.stat.exists }}'
 
   - name: Fail the playbook if bootstrap fails to install
     fail: